linux-kernel - Re: [PATCH v3] mac802154: Fix potential RCU dereference issue in mac802154_scan

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Message-ID: <172717177514.3057794.16241311556115087833.b4-ty@datenfreihafen.org>
Date: Tue, 24 Sep 2024 12:00:39 +0200
From: Stefan Schmidt <stefan@...enfreihafen.org>
To: Jiawei Ye <jiawei.ye@...mail.com>
Cc: Stefan Schmidt <stefan@...enfreihafen.org>,
	alex.aring@...il.com,
	davem@...emloft.net,
	david.girault@...vo.com,
	edumazet@...gle.com,
	kuba@...nel.org,
	linux-kernel@...r.kernel.org,
	linux-wpan@...r.kernel.org,
	miquel.raynal@...tlin.com,
	netdev@...r.kernel.org,
	pabeni@...hat.com,
	przemyslaw.kitszel@...el.com,
	stable@...r.kernel.org
Subject: Re: [PATCH v3] mac802154: Fix potential RCU dereference issue in mac802154_scan_worker

Hello Jiawei Ye.

On Tue, 24 Sep 2024 06:58:05 +0000, Jiawei Ye wrote:
> In the `mac802154_scan_worker` function, the `scan_req->type` field was
> accessed after the RCU read-side critical section was unlocked. According
> to RCU usage rules, this is illegal and can lead to unpredictable
> behavior, such as accessing memory that has been updated or causing
> use-after-free issues.
> 
> This possible bug was identified using a static analysis tool developed
> by myself, specifically designed to detect RCU-related issues.
> 
> [...]

Applied to wpan/wpan.git, thanks!

[1/1] mac802154: Fix potential RCU dereference issue in mac802154_scan_worker
      https://git.kernel.org/wpan/wpan/c/bff1709b3980

regards,
Stefan Schmidt